NO752996L - - Google Patents
Info
- Publication number
- NO752996L NO752996L NO752996A NO752996A NO752996L NO 752996 L NO752996 L NO 752996L NO 752996 A NO752996 A NO 752996A NO 752996 A NO752996 A NO 752996A NO 752996 L NO752996 L NO 752996L
- Authority
- NO
- Norway
- Prior art keywords
- tooth
- cutter
- teeth
- cutters
- axis
- Prior art date
Links
- 238000005553 drilling Methods 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 description 7
- 239000004575 stone Substances 0.000 description 4
- 241000282326 Felis catus Species 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- YSSSPARMOAYJTE-UHFFFAOYSA-N dibenzo-18-crown-6 Chemical compound O1CCOCCOC2=CC=CC=C2OCCOCCOC2=CC=CC=C21 YSSSPARMOAYJTE-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
- E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/16—Roller bits characterised by tooth form or arrangement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Description
"Sor© innrotniRg" "Sor© inrotniRg"
Oppfinnelsen angår fordelingen av kuttetenner i boreinn-rétninger som anvendes for eksempel i jord eller sten, og særlig slike innretninger hvor overflaten som påvirkes av tennene under drift skråner i forhold til innretningens generelle fremdrifts-retnihg, som røed generelt konisk formede boreinnretninger. The invention relates to the distribution of cutting teeth in drilling devices that are used, for example, in soil or rock, and in particular such devices where the surface affected by the teeth during operation is inclined in relation to the device's general direction of progress, such as generally conically shaped drilling devices.
Oppfinnelsen tilveiebringer i sine forskjellige aøpekter, megét effektiv kutting, uten at det i vesentlig grad dannes rygger eller forhøyninger i stenen (enten periferiske, det vil si forløpende i kutternes generelle rotasjonsretning, eller aksielle, det vil si forløpende i innretningens generelle fremdriftsret-ning) som ville ku£tt&e øke de nødvendige skjærekrefter eller komme i veien for kutterlegemet. Verktøyets levetid forlenges, og sli-tasjen holdes under kontroll.Borakaksens størrelse blir jevnere. Som følge av de lave skjærekrefter som kreves, kan kutterne skrå-stilles slik at anordningen blir selvfremdrivende. The invention provides, in its various aspects, very efficient cutting, without the formation of ridges or elevations in the stone to any significant extent (either circumferential, i.e. continuously in the cutter's general direction of rotation, or axial, i.e. continuously in the device's general direction of progress). which would increase the necessary cutting forces or get in the way of the cutter body. The life of the tool is extended, and wear is kept under control. The size of the drill bits becomes more uniform. As a result of the low cutting forces required, the cutters can be tilted so that the device becomes self-propelled.
Oppfinnelsen tilveiebringer en boreinnretning av en art hvor kuttere er montert for rotasjon om respektive kutterakser i en ramme som igjen roteres om en rammeakse, og hvor hver kutter omfatter et legeme som Berer tenner som under drift stryker over og skjærer ned i en ovorflåte som skråner i forhold til innretningens fremdriftsretriing,karakterisert vedat det på hver kutter er anordnet utvalgte tannpartier eller -soner med innbyrdes avstand langs de respektive kutterakser, at kutternes tannpartier er anordnet i en ordnet (ordered) syklus som strekker seg langs rammeaksen, at tilstøtende partier i syklusen ligger på forskjellige kuttere og overlapper hverandre langs rammeaksen, og at partiene, som betraktet fortløpende i syklusen, har vekselvis høy og lav effektiv tanntetthet for å motvirke at tennene i ett tannparti styres inn i kuttsporene fra tennene i det foregående parti. I foretrukne utføringsformer er der tre kuttere, og intet sett av tre tilstøtende partier i syklusen inneholder mer enn ett parti fra hver kutter; hvert parti består av en enkelt rad med tenner anordnet kretsmes-sig omkring de respektive kutterakser; hvert partis utstrekning i retning fra overflaten og i kutteraksens plan er mindre enn tann-høyden dividert på tangenten til vinkelen mellom overflaten og fremdriftsaksenj hvert par tilstøtende partier i syklusen har respektive tannantall i forholdet NH/,2 < NL<<>NH » hvor N T, er antall tenner i partiet med høy effektiv tetthet i paret og NL er tann-antallét i partiet med lav effektiv tetthet i paret (fortrinnsvis NH/Jfe*9 ^ NL<<N>H/1,1Pg ytterligere foretrukket?5^ NL<<>The invention provides a drilling device of a kind where cutters are mounted for rotation about respective cutter axes in a frame which in turn is rotated about a frame axis, and where each cutter comprises a body which bears teeth which, during operation, sweep over and cut down in an overfleet which slopes in in relation to the device's forward retrieving, characterized by the fact that each cutter has selected tooth sections or zones spaced apart along the respective cutter axes, that the cutters' tooth sections are arranged in an ordered cycle that extends along the frame axis, that adjacent sections in the cycle lie on different cutters and overlap each other along the frame axis, and that the parts, as considered consecutively in the cycle, have alternately high and low effective tooth density to counteract the teeth in one tooth part being guided into the cutting grooves from the teeth in the previous part. In preferred embodiments, there are three cutters, and no set of three adjacent lots in the cycle contains more than one lot from each cutter; each part consists of a single row of teeth arranged circularly around the respective cutter axes; the extent of each part in the direction from the surface and in the plane of the cutter axis is less than the tooth height divided by the tangent to the angle between the surface and the forward axis, each pair of adjacent parts in the cycle has a respective number of teeth in the ratio NH/,2 < NL<<>NH » where N T , is the number of teeth in the high effective density portion of the pair and NL is the number of teeth in the low effective density portion of the pair (preferably NH/Jfe*9 ^ NL<<N>H/1.1Pg further preferred?5^ NL <<>
NH/1 25^? der er tre kuttere°9syklusen skrider frem fra kutter NH/1 25^? there are three cutters°9 the cycle progresses from cutter
til katter, idet partier med høy og lav tanntetthet på hver kutter veksler langs de respektive kutterakser; og kutteraksene er skrå-sti lt i forhold til rammeaksen, har samme innbyrdes vinkelavstand om denne, og heller slik at innretningens totale omriss avsmalner langs kutternes for cats, as parts with high and low tooth density on each cutter alternate along the respective cutter axes; and the cutter axes are inclined in relation to the frame axis, have the same mutual angular distance about this, and rather so that the total outline of the device tapers along the cutters
Andre trekk og fordeler ved oppfinnelsen vil fremgå av føl-gende beskrivelse av en foretrukket utføringsform i forbindelse med tegningen hvorj Other features and advantages of the invention will be apparent from the following description of a preferred embodiment in connection with the drawing in which
Fig. 1 er et sideriss av en boreinnretning forbundet med et utsnitt av en rørstreng, Fig. 2 er et riss lik fig. 1, sett fra en annen vinkel, og med rørstrengen og styrekronen utelatt, Fig. 3 er et riss i større målestokk av et parti av fig. 1, delvis i snitt, Fig. 4-8 er snitt langs henholdsvis 4-4, 5-5, 6-6, 7-7 og Fig. 1 is a side view of a drilling device connected to a section of a pipe string, Fig. 2 is a view similar to fig. 1, seen from another angle, and with the tube string and guide crown omitted, Fig. 3 is a view on a larger scale of a portion of fig. 1, partly in section, Fig. 4-8 are sections along 4-4, 5-5, 6-6, 7-7 and
8-8 i fig. 1,8-8 in fig. 1,
Fig. 9 er et snitt langs 9-9 i fig. 3 hvor kutterakslene er fjernet, Fig. 10 er et riss i større målestokk av et utsnitt av en kutter hvor en kuttertann er vist med brutte linjer i en første stilling i hullet som bores, og med heltrukne linjer i en senere, aksielt fremskutt stilling, og Fig. 11 viser et eksempel på tre kuttere med en tannforde-ling ifølge oppfinnelsen. Fig. 9 is a section along 9-9 in fig. 3 where the cutter shafts have been removed, Fig. 10 is a drawing on a larger scale of a section of a cutter where a cutter tooth is shown with broken lines in a first position in the hole being drilled, and with solid lines in a later, axially advanced position, and Fig. 11 shows an example of three cutters with a tooth distribution according to the invention.
På tegningen er vist en hovedramme lo som i sitt toppparti ved hjelp av et utvendig gjenget koplingsorgan 12 er forbundet med rørstrengen 14 som strekker seg bakover tii boreriggen på overflaten, og i sitt bunnparti ved hjelp av et Innvendig gjenget koplingsorgan 16 er forbundet med en konvensjonell tre-kjeglet styre-borkrone 18. Rammen 10avsmalner fra toppart! til bannparti langs tre trykkstaver eller stag 20 som er anordnet n;ad innbyrdes avstand rundt omkretsen og strekker seg mellom Øvre og nedre ratnme-p&rtier 22 og 24. Tre katter* 26, 28 og 30 er anordnet enkeltvis mellom stagene 20. The drawing shows a main frame lo which in its upper part by means of an externally threaded coupling means 12 is connected to the pipe string 14 which extends backwards into the drilling rig on the surface, and in its bottom part by means of an internally threaded coupling means 16 is connected to a conventional three-cone steering drill bit 18. The frame 10 tapers from the top! to the bann part along three pressure rods or struts 20 which are arranged close to each other's distance around the circumference and extend between the Upper and lower ratnme parts 22 and 24. Three cats* 26, 28 and 30 are arranged individually between the struts 20.
Hver katter har tanne letrønter 32 aom er opptatt i et legeme 33 som er montert for rotasjon om en aksel 34 (fig. 3) med en akse 35 som foruten at den stort sett følger stagenes 20 av-sitt* lning også er skråstlllet (for eksempel mad 2-4°, fig 2) i forhold til rammens 10 vertikale akse 36. Tannfordelingen vist i fig 1-3 er akjaroatisk og ikke i samsvar med foreliggende oppfin-nelse, idet tannfordel ingen ifølge oppfinnelsen er vist 1 fig. 11. Under drift vil rotasjon av ramrasn 1 bevirke rotasjon av kutterne 26, 28 og 30 slik ot styrehullet som utbores av borkronen 18 for-størres. På grunn av kutternes skråstilling oppstår vertikale kraftkomponenter mellom hull va agen og kutterne, hvilket bevirker at innretningen i det minste Uelvis blir selvfreædrivende. Legemet 33 er konisk avamalnende i området hvor det opptar tanneleraentena 32, og i utboringer 40 og 42 er festet et Øvre og ét nedre ringformet trykk-lager 44 og 46 mens rad ia1lågerelementer 50 og 52 er festet mød innbyrdes aksiell avstand på den indre sy-lindriske overflate til legemets midtre boring 48. Det øvre lager Each cat has toothed teeth 32 which are engaged in a body 33 which is mounted for rotation about an axle 34 (fig. 3) with an axis 35 which, in addition to largely following the position of the stays 20, is also inclined (for example mad 2-4°, fig. 2) in relation to the vertical axis 36 of the frame 10. The tooth distribution shown in fig. 1-3 is akjaroatic and not in accordance with the present invention, since no tooth distribution according to the invention is shown in fig. 11. During operation, rotation of the ram frame 1 will cause rotation of the cutters 26, 28 and 30 so that the pilot hole drilled by the drill bit 18 is enlarged. Due to the slanting position of the cutters, vertical force components occur between the hole and the cutters, which causes the device to become self-propelled, at least to an extent. The body 33 is conically tapered in the area where it occupies the pine clay elements 32, and in bores 40 and 42 an upper and a lower annular thrust bearing 44 and 46 are attached, while a row of bearing elements 50 and 52 are attached at an axial distance from each other on the inner seam. cylindrical surface to the middle bore of the body 48. The upper layer
44 løpar mot et utvidet øvre parti 54 på akselen 34, som virker som 44 runs towards an extended upper part 54 of the shaft 34, which acts as
en trykk-krage utformet i ett med akselen. Det nedre trykklager 46 løper mot en trykkrage 55 som er innført i kutterlegemets utbo-ring 42 og ved hjelp av pinner (ikka vist) forbundet med akselen for fi hindre at kragen roteres om akselen samtidig som aksiell re-lativ bevegelse tillates mellom krage,og aksel. a pressure collar designed in one with the shaft. The lower thrust bearing 46 runs against a thrust collar 55 which is introduced into the cutter body's bore 42 and connected to the shaft by means of pins (not shown) to prevent the collar from rotating around the shaft while allowing axial relative movement between the collar, and axle.
Organer er anordnet for tilførsel av spylefluidum (for eksempel luft, rent vann, eller siam etc.) tii styrékronen 18 samt til kutterne 26, 28 og 30, for spyling av stenssom fjernes under boreoperasjonen, samt for avtetting av lagrene. Som vist i flg. 8 har øvre og nodre partier 22 og 24 på rammen 10 redusert diameter mellom stillingene til de tre kutter-aksler 34, hvorved der dannes utsparringer lango hvilke stenkaks som danne3 under børeoperasjonen kan strømme. Hardmetallinnlegg 200 er anordnet i raramaomkretsen ved partiene 22 og 24 for å be-skytte remmen mot slitasje. Organs are arranged for the supply of flushing fluid (for example air, clean water, or siam etc.) to the steering crown 18 and to the cutters 26, 28 and 30, for flushing stones that are removed during the drilling operation, as well as for sealing the bearings. As shown in fig. 8, the upper and northern parts 22 and 24 of the frame 10 have a reduced diameter between the positions of the three cutter shafts 34, whereby recesses are formed along which the rock cuttings formed during the drilling operation can flow. Carbide insert 200 is arranged in the frame circumference at parts 22 and 24 to protect the belt against wear.
• Ifølge oppfinnelsen er tennene 32 fordelt i kutterlegemane 33 for (1) å hindre at periferiske rygger ellor forhøyninger byg-ges opp under boreprosessen, idet slike rygger ellereæmåtte for - serea av suksessiva tenner og således ville ødelegge innretningens • According to the invention, the teeth 32 are distributed in the cutter bodies 33 in order (1) to prevent peripheral ridges or elevations from being built up during the drilling process, as such ridges or ridges could be replaced by successive teeth and thus would destroy the device's
selvfreardrivonde karakteristikk, og (2) å redusere teneenes tendens self-driving characteristic, and (2) to reduce the tendency of the teeth
til å følga kuttsporsne fra foregående tenner og sålados skjære en "styring" ("gear"), hvor ryggene strekker aog stort sett i innretningens froradriftsretning. to follow the cut tracks from previous teeth and thus cut a "steering" ("gear"), where the ridges extend largely in the direction of the device's forward operation.
Som vist på fig. 11 er tennene pa hvert kutterlegeme anordnet i periferiske rader i numstarorden i en syklus langs innretningens generelle fremdriftsakse 36. I hver av disse radene danner tonnene et tannparti isod breddo w (vist på tagningen, for eksempel R?) langs kuttorlegemets overflate, ttøntatfc £ra den ordaede oyklus©r radene G og a-c ved ellor nær kuttarans endes>,idetGpasioll©forhold som skal omteles nedenfor or knyttet feil disso radar. As shown in fig. 11, the teeth on each cutter body are arranged in circumferential rows in numerical order in a cycle along the device's general forward axis 36. In each of these rows, the teeth form a tooth section isod width w (shown in the drawing, for example R?) along the surface of the cutter body, ttøntatfc £ra the aforesaid oyclus©r rows G and a-c at or near the end of the cutter>, since the Gpassioll© condition to be discussed below was connected to the wrong disso radar.
Ifølge et aspekt ved oppfinnelsen ar all© nabopartien© RRog Rn+1i den ordnedo cyklus beliggende på forskjellige ktattero<p>g overlapper hverandre langs aksen 36. Som følga av overlappingen vil kuttsporene som dannes i stenen av tenner fra suksessiv© partier likeledes overlappe langs den vertikaleQkso i hullet som bores, According to one aspect of the invention, all of the neighboring parts RR and Rn+1 in the ordered cycle located on different katteros overlap each other along the axis 36. As a result of the overlap, the cut grooves formed in the stone by teeth from successive parts will also overlap along the vertical Qkso in the hole being drilled,
slik at dannelse av periferiske rygger ne 1lom tannpartiens for-hindres. so that the formation of peripheral ridges around the teeth is prevented.
Ifølgo ©t annat aapskt vod oppfinnaIsen har tannpartier SR, i rokke følg© langs syklusen-, voksa Ivio høy og lav effektiv tanntetthet for å motvirke tendensen til at tennene i et tannparti følger kuttsporane fro tennene i foragåendo partier. Derved hind-res styrekutting (gear cutting) idet tennene i ot parti fjerner materialet mellom kuttsporene fra tonnar i foregående parti. Oa In accordance with another aspect of the invention, the tooth sections SR, in rotation follow along the cycle, Ivio grew high and low effective tooth density to counteract the tendency for the teeth in a tooth section to follow the cut tracks from the teeth in previous sections. Thereby gear cutting is prevented as the teeth in the second part remove the material between the cutting grooves from tons in the previous part. Oh
det ikke er ønskelig at ett tannparti har nøyaktig dobbelt så mange tennor (ellor hvilket som helst annet hele multiplum) sogi i at it is not desirable that one part of the tooth has exactly twice as many teeth (or any other whole multiple) so that
. nabopa*rtl (hole multipla ville ikke hindre kutt a po r styr ing), og. neighboring pa*rtl (hole multiples would not prevent cut a po r steering ing), and
da det er ønskelig å ha så mange tennar aom mulig i partier mad lav tetthet, er det foretrukne arrangement slik at forholdet mellom tannantallet NH/og K^for tilstøtende partiar oller nabopar-tier med henholdsvis høy og lav tanntetthet ar-gitt_jsom følgers as it is desirable to have as many teeth as possible in parts with low density, the preferred arrangement is such that the ratio between the number of teeth NH/ and K^ for adjacent parts or neighboring parts with respectively high and low tooth density is as follows
*w2-<nl;<ssw ;sålede3 kon^^.^a^<kl <:Vi,i? ellar *w2-<nl;<ssw ;sålede3 kon^^.^a^<kl <:Vi,i? or else
ytterligere foretrukket, 75 < NL ^h/i 25<*>further preferred, 75 < NL ^h/i 25<*>
Ved kutternes topp- og bunnpartier vil spesielle behov ofte føre til avvik fra ovennevnte forhold. For eksempel er det ved bunnpartiettnødvendig å ha tenner i samme aksielle stilling på alle tre kuttere, slik. at alle kan føres inn i styrehullet, og ved topp-partiet er det Ønskelig med praktisk talt så mang tenner som mulig for å minimalisere slitasje, ettersom slitasje på disse tenner fører til reduksjon av den utborede hulldiameter. At the top and bottom parts of the cutters, special needs will often lead to deviations from the above conditions. For example, at the bottom part, it is necessary to have teeth in the same axial position on all three cutters, like this. that all can be fed into the guide hole, and at the top part it is desirable to have practically as many teeth as possible to minimize wear, as wear on these teeth leads to a reduction of the drilled hole diameter.
Hver kutter har således ved samsvarende aksialstillinger en bunntannrad c^., c2*c3, og en topprad 6^, G^, Gy Tennene i radene G^j ér målténner (gage teeth) som er anordnet over kutterlegemets kronlinje 202, og er uvirksomme inntil tennene nærmest under kronlinjen slites, og de virker da til å opprettholde hull-diameteren. I tillegg er ekstare tannrader a og b anordnet henholdsvis på kutterne 30 og 26 for utligning. Each cutter thus has, in corresponding axial positions, a bottom row of teeth c^., c2*c3, and a top row 6^, G^, Gy The teeth in the rows G^j are gage teeth which are arranged above the crown line 202 of the cutter body, and are inactive until the teeth closest to the crown line are worn, and they then act to maintain the hole diameter. In addition, additional rows of teeth a and b are arranged respectively on the cutters 30 and 26 for compensation.
Det skal forstås at innen dan tannpartisyklus oom bestem-mes av overlappingen og tetthetsforholdet ifølgo éppfinnaXsen trenger ikke tennene i et gitt parti å vær® i en enkelt periferisk rad som vist, men kan være forskjøvet i forhold til kutterakseh. It should be understood that within the tooth part cycle oom determined by the overlap and density ratio according to the same finding, the teeth in a given part need not be® in a single circumferential row as shown, but may be offset in relation to the cutter axis.
Ifølge et ytterliger aspekt ved oppfinnelsen er bredden W (det vil si: utstrekningen langs overflaten 33A på legemet 33) til hvert tannparti begrenset for å unngå store rygger eller forhøy-ninger og inngrojKmed kutterlegemet. Fig. 10 viser skjematisk, med brutte linjer, en kutter i en førsta, innledende stilling, og med heitrukné linjer i en senere stilling etter flere omdreininger av kutteren. Det fremgår at dersom en.tannrad 32 skulle innlede en According to a further aspect of the invention, the width W (that is: the extent along the surface 33A of the body 33) of each tooth portion is limited to avoid large ridges or elevations and ingrowth with the cutter body. Fig. 10 shows schematically, with broken lines, a cutter in a first, initial position, and with dashed lines in a later position after several revolutions of the cutter. It appears that if a tooth row 32 were to introduce a
styring i stenen, vil en betydelig rygghøyde kunne dannes før den neste tannrad får anledning til å bryte opp den aksioIle rygg. Ettersom må v$sre mindre enn tannhØyden Qg (det vil si den avstand med hvilken tennene rager ut fra kutterlegemat), og ettersom dan maksimale Ha som kan utvikles 1 Sn tanribreddo W er H^ltøktann a, hvor w er bredden av tannraden og a er vinkelen mellom aksen 36 steering in the stone, a significant ridge height will be able to form before the next row of teeth has the opportunity to break up the axial ridge. Since must be less than the tooth height Qg (that is, the distance by which the teeth protrude from the cutter body), and since then the maximum Ha that can be developed 1 Sn tooth rib width W is H^ltøktann a, where w is the width of the tooth row and a is the angle between the axis 36
og den stumpkjegleformede omhylling 300 av de tro kutterlegemer,and the frustoconical casing 300 of the true cutter bodies,
er det en kritisk betingelse atis it a critical condition that
W - H^/tann a W - H^/tooth a
f praksis foretrekkes en tannbredde som liggar godt under denne kritiske verdi..' V, . •'■''•.„'"'•»■ I den viste utføringsform er tann a 0,2» 13- «0,25»In practice, a tooth width that is well below this critical value is preferred..' V, . •'■''•.„'"'•»■ In the embodiment shown, tooth a is 0.2" 13- "0.25"
w = 0,625»og tanntettheten samt plasseringen er som følger» w = 0.625" and the tooth density and location are as follows"
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/506,021 US3945447A (en) | 1974-09-16 | 1974-09-16 | Boring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
NO752996L true NO752996L (en) | 1976-03-17 |
Family
ID=24012833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO752996A NO752996L (en) | 1974-09-16 | 1975-09-01 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3945447A (en) |
JP (1) | JPS5159702A (en) |
BR (1) | BR7505967A (en) |
CA (1) | CA1027549A (en) |
DE (1) | DE2540558A1 (en) |
NL (1) | NL7510719A (en) |
NO (1) | NO752996L (en) |
SE (1) | SE7510220L (en) |
ZA (1) | ZA755093B (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4189012A (en) * | 1978-01-30 | 1980-02-19 | Smith International, Inc. | Earth boring tool |
US4449595A (en) * | 1982-05-17 | 1984-05-22 | Holbert Don R | Method and apparatus for drilling a curved bore |
CA1234561A (en) * | 1985-06-26 | 1988-03-29 | Kenneth M. White | Profiled body roller-reamer stabilizer |
US5220964A (en) * | 1991-09-23 | 1993-06-22 | The Charles Machine Works, Inc. | Downhole compaction and stabilization back reamer and drill bit |
US5497842A (en) * | 1995-04-28 | 1996-03-12 | Baker Hughes Incorporated | Reamer wing for enlarging a borehole below a smaller-diameter portion therof |
USRE36817E (en) * | 1995-04-28 | 2000-08-15 | Baker Hughes Incorporated | Method and apparatus for drilling and enlarging a borehole |
US5992548A (en) * | 1995-08-15 | 1999-11-30 | Diamond Products International, Inc. | Bi-center bit with oppositely disposed cutting surfaces |
US6123160A (en) * | 1997-04-02 | 2000-09-26 | Baker Hughes Incorporated | Drill bit with gage definition region |
US6206117B1 (en) | 1997-04-02 | 2001-03-27 | Baker Hughes Incorporated | Drilling structure with non-axial gage |
US6568488B2 (en) | 2001-06-13 | 2003-05-27 | Earth Tool Company, L.L.C. | Roller pipe burster |
AU2003218254A1 (en) * | 2002-03-18 | 2003-10-08 | Allen Kent Rives | Stacked drill bit and toroidal reamer and method |
US9574405B2 (en) | 2005-09-21 | 2017-02-21 | Smith International, Inc. | Hybrid disc bit with optimized PDC cutter placement |
US20070240906A1 (en) * | 2006-03-31 | 2007-10-18 | Hill Gilman A | Tapered reamer bit |
US7621345B2 (en) * | 2006-04-03 | 2009-11-24 | Baker Hughes Incorporated | High density row on roller cone bit |
US8955413B2 (en) * | 2009-07-31 | 2015-02-17 | Smith International, Inc. | Manufacturing methods for high shear roller cone bits |
US8672060B2 (en) * | 2009-07-31 | 2014-03-18 | Smith International, Inc. | High shear roller cone drill bits |
WO2011084944A2 (en) * | 2010-01-05 | 2011-07-14 | Smith International, Inc. | High-shear roller cone and pdc hybrid bit |
JP5322114B2 (en) * | 2010-05-01 | 2013-10-23 | 張山電氣株式会社 | Cutter head |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US930758A (en) * | 1908-11-20 | 1909-08-10 | Howard R Hughes | Drill. |
US1302058A (en) * | 1913-12-01 | 1919-04-29 | Mahlon E Layne | Drilling apparatus. |
US2029770A (en) * | 1934-10-26 | 1936-02-04 | Grant John | Roller cutter reamer |
US2126145A (en) * | 1935-10-14 | 1938-08-09 | Herman C Smith | Cutter |
US2122863A (en) * | 1936-04-13 | 1938-07-05 | Globe Oil Tools Co | Reamer |
US2093603A (en) * | 1936-05-06 | 1937-09-21 | Chiksan Oil Tool Company Ltd | Well reamer |
US2499630A (en) * | 1946-12-05 | 1950-03-07 | Paul B Clark | Casing expander |
US2915291A (en) * | 1956-01-18 | 1959-12-01 | Gulfelt Lars | Cross shaft rotary drill bit |
US3018835A (en) * | 1956-11-01 | 1962-01-30 | Reed Roller Bit Co | Drill bit for producing an irregular indentation pattern on the bottom of a well bore |
US3306381A (en) * | 1963-12-16 | 1967-02-28 | Drilco Oil Tools Inc | Reaming apparatus |
US3306379A (en) * | 1965-03-25 | 1967-02-28 | Drilco Oil Tools Inc | Roller reamer |
US3419093A (en) * | 1967-05-29 | 1968-12-31 | Dresser Ind | Cutter assembly for well tools |
US3726350A (en) * | 1971-05-24 | 1973-04-10 | Hughes Tool Co | Anti-tracking earth boring drill |
US3805901A (en) * | 1972-08-10 | 1974-04-23 | Ingersoll Rand Co | Earth cutter assembly |
CA1016534A (en) * | 1972-12-29 | 1977-08-30 | Kenneth M. White | Roller reamer stabilizer |
-
1974
- 1974-09-16 US US05/506,021 patent/US3945447A/en not_active Expired - Lifetime
-
1975
- 1975-08-07 ZA ZA00755093A patent/ZA755093B/en unknown
- 1975-09-01 NO NO752996A patent/NO752996L/no unknown
- 1975-09-11 DE DE19752540558 patent/DE2540558A1/en active Pending
- 1975-09-11 NL NL7510719A patent/NL7510719A/en not_active Application Discontinuation
- 1975-09-12 SE SE7510220A patent/SE7510220L/en unknown
- 1975-09-12 CA CA235,344A patent/CA1027549A/en not_active Expired
- 1975-09-16 BR BR7505967*A patent/BR7505967A/en unknown
- 1975-09-16 JP JP50112039A patent/JPS5159702A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
BR7505967A (en) | 1976-08-03 |
DE2540558A1 (en) | 1976-04-01 |
CA1027549A (en) | 1978-03-07 |
ZA755093B (en) | 1976-07-28 |
SE7510220L (en) | 1976-03-17 |
JPS5159702A (en) | 1976-05-25 |
NL7510719A (en) | 1976-03-18 |
US3945447A (en) | 1976-03-23 |
AU8376475A (en) | 1977-02-10 |
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